Prolabs – Lx-sfp-1g-c

Transcript

ProLabs – LX-SFP-1G-C 1.25GBd SFP (Small Form Pluggable) Long Wavelength (1310nm) Transceiver GLC-LH-SMD-C Overview ProLabs’s LX-SFP-1G-C SFP optical transceivers are based on Gigabit Ethernet IEEE 802.3 standard and Fiber Channel FC-PI Rev.5.0 and provide a quick and reliable interface for the GE/FC application. In addition, they comply with the Small Form Factor Pluggable Multi Sourcing Agreement (MSA). In addition, they comply with the Small Form Factor Pluggable Multi Sourcing Agreement (MSA) and SFF-8472. Product Features             Up to 1.25 GBd bi-directional data links Compliant with IEEE 802.3z Gigabit Ethernet and 1000BASE-LX Compliant with SFP MSA Hot-pluggable SFP footprint 1310nm Fabry-Perot laser transmitter Built-in digital diagnostic functions Duplex LC connector Up to 10-20km on 9/125um SMF Single power supply 3.3V RoHS Compliance Class 1 laser product complies with EN 60825-1 Operating temperature range: -5℃ to 85℃. Applications   1.25 GBd Gigabit Ethernet 1.063 GBd Fiber Channel Ordering Information Part Number LX-SFP-1G-C Description GE/FC SFP 1310nm LC Connectors 10km on SMF, with DOM function. General Specifications Parameter Data Rate Bit Error Rate Operating Temperature Storage Temperature Supply Current Input Voltage Maximum Voltage Symbol Min DR BER TOP TSTO IS VCC VMAX Typ Max 1.25 1.062 GBd 10 5 3  0.5 175 3.3 Remarks IEEE 802.3 FC-PI-2 Rev 5 12 85  40 Unit 85 300 3.6 4 ℃ ℃ Case temperature mA V V For electrical power interface Ambient temperature For electrical power interface Optical Characteristics – Transmitter VCC=3V to 3.6V, TC=-5℃ to 85℃ Parameter Output Optical Power Optical Center Wavelength Symbol PTX Optical Modulation Amplitude Extinction Ratio Spectral Width (RMS) Optical Rise/Fall Time (20% - 80%) Relative Intensity Noise Deterministic Jitter Contribution Total Jitter Contribution Min C  9.5 1260 OMA 174 ER 9  TRF_IN RIN TX_DJ TX_TJ Typ Max Unit 3 1355 dBm nm uW 20 50 3 260  120 60 120 dB nm ps dB/Hz ps ps Typ Max Unit 0 1600  22  22  14.5 dBm nm dBm dBm dBm dB 1500 MHz  22 dBm dBm dB Max Unit 1200 VCC VEE+0.8 10 mV V V us 150 Remarks Class 1 Product Equivalent extinction ratio specification for FC Optical Characteristics – Receiver VCC=3V to 3.6V, TC=-5℃ to 85℃ Parameter Optical Receiver Power Optical Center Wavelength Receiver Sensitivity @ 1.063GBd Receiver Sensitivity @ 1.25GBd Stressed Rx Sens @ 1.25GBd Optical Return Loss Receiver Electrical 3dB Upper cutoff frequency Loss of Signal-Asserted Loss of Signal-Deasserted Loss of Signal-Hysteresis Symbol PRX Min C  20 1265 ORL 12 RX_SEN1 RX_SEN2 PLOS_A PLOS_D  30 0.5 Remarks Average FC-PI-2 Rev.5 IEEE 802.3 IEEE 802.3 Electrical Characteristics – Transmitter VCC=3V to 3.6V, TC=-5℃ to 85℃ Parameter Input differential impedance Single ended data input swing Transmit disable voltage Transmit enable voltage Transmit disable assert time Symbol RIN VIN_PP VD VEN Min Typ 100 250 VCC1.3 VEE Ω Remarks Non condensing Electrical Characteristics – Receiver VCC=3V to 3.6V, TC=-5℃ to 85℃ Parameter Single ended data output swing Data output rise/fall time (20%-80%) LOS Fault LOS Normal Power Supply Rejection Deterministic Jitter Contribution Total Jitter Contribution Symbol VOUT_PP TR VLOS_Fault VLOS_normal PSR RX_DJ RX_TJ Min Typ Max Unit 300 400 800 300 mV ps V V mVPP ps ps VCC0.5 VEE 100 VCC_HOST VEE+0.5 80 122.4 Remarks Digital Diagnostic Functions LX-SFP-1G-C support the 2-wire serial communication protocol as defined in the SFP MSA. Digital diagnostic information are accessible over the 2-wire interface at the address 0xA2. Digital Diagnostics for LX-SFP-1G-C are internally calibrated by default. A micro controller unit inside the transceiver gathers the monitoring information and reports the status of transceiver. Transceiver Temperature, internally measured, represented as a 16 bit signed twos complement value in increments of 1/256 degrees Celsius, Temperature accuracy is better than ±3 degrees Celsius over specified operating temperature and voltage. Transceiver Supply Power, internally measured, represented as a 16 bit unsigned integer with the voltage defined as the full 16 bit value (0 – 65535) with LSB equal to 100 µVolt, yielding a total range of 0 to +6.55 Volts. Transceiver TX bias current, internally measured, represented as a 16 bit unsigned integer with the current defined as the full 16 bit value (0 – 65535) with LSB equal to 2 µA, yielding a total range of 0 to 131mA. Accuracy is better than ±10% over specified operating temperature and voltage. Transceiver TX output power, internally measured, represented as a 16 bit unsigned integer with the power defined as the full 16 bit value (0 – 65535) with LSB equal to 0.1 µW. Data is assumed to be based on measurement of laser monitor photodiode current. Accuracy is better than ±3dB over specified temperature and voltage. Data is not valid when the transmitter is disabled. Transceiver RX received optical power, internally measured, represented as a 16 bit unsigned integer with the power defined as the full 16 bit 35 value (0 – 65535) with LSB equal to 0.1 µW. Accuracy is better than ±3dB over specified temperature and voltage. Block Diagram of Transceiver TX_FAULT TX_DISABLE TX_DATA TX_DATA\ RX_DATA RX_DATA\ ELECTRICAL OPTICAL SUBASSEMBLY SUBASSEMBLY Safety Control LD Driver Limiting Amp LOS Detect DUPLEX LC RECEPTACL E RX_LOS MOD_DEF2 MOD_DEF1 MOD_DEF0 Micro Controller MOD DEF PRE AMP OPTICAL SUBASSEMBLY Transmitter Section The FP driver accept differential input data and provide bias and modulation currents for driving a laser. An automatic power-control (APC) feedback loop is incorporated to maintain a constant average optical power. 1310 nm FP in an eye safe optical subassembly (OSA) mates to the fiber cable. TX_DISABLE The TX_DISABLE signal is high (TTL logic “1”) to turn off the laser output. The laser will turn on within 1ms when TX_DISABLE is low (TTL logic “0”). TX_FAULT When the TX_FAULT signal is high, output indicates a laser fault of some kind. Low indicates normal operation. Receiver Section The receiver utilizes a PIN detector integrated with a trans-impedance preamplifier in an OSA. This OSA is connected to a Limiting Amplifier which providing post-amplification quantization, and optical signal detection. The limiting Amplifier is AC-coupled to the transimpedance amplifier, with internal 100Ω differential termination. Receive Loss (RX_LOS) The RX_LOS is high (logic “1”) when there is no incoming light from the companion transceiver. This signal is normally used by the system for the diagnostic purpose. The signal is operated in TTL level. Controller Section The micro controller unit monitors the operation information of LD driver and Limiting Amplifier. And report these status to the customer. Dimensions ALL DIMENSIONS ARE ±0.2mm UNLESS OTHERWISE SPECIFIED UNIT: mm PCB Layout Recommendation Electrical Pad Layout Towards ASIC 20 11 10 1 Towards Bezel Pin Assignment PIN # Symbol Description 1 VEET Transmitter ground (common with receiver ground) 2 TFAULT 3 TDIS 4 MOD_DEF (2) Module Definition 2. Data line for serial ID 5 MOD_DEF (1) Module Definition 1. Clock line for serial ID 6 MOD_DEF (0) Module Definition 0. Grounded within the module 7 8 Rate Select LOS 9 10 11 12 13 VEER VEER VEER RD– RD+ No connection required Loss of Signal indication. Logic 0 indicates normal operation Receiver ground (common with transmitter ground) Receiver ground (common with transmitter ground) Receiver ground (common with transmitter ground) Receiver Inverted DATA out. AC coupled Receiver Non-inverted DATA out. AC coupled 14 VEER Receiver ground (common with transmitter ground) 15 16 VCCR VCCT Receiver power supply Transmitter power supply 17 VEET Transmitter ground (common with receiver ground) 18 19 TD+ TD– Transmitter Non-Inverted DATA in. AC coupled Transmitter Inverted DATA in. AC coupled 20 VEET Transmitter ground (common with receiver ground) Remarks Circuit ground is isolated from chassis ground Transmitter Fault. Not supported Transmitter Disable. Laser output disable on high or open Disabled: TDIS>2V or open Enabled: TDIS<0.8V Should Be pulled up with 4.7k – 10k ohm on host board to a voltage between 2V and 3.6V LOS is open collector output Circuit ground is isolated from chassis ground Circuit ground is isolated from chassis ground Circuit ground is connected to chassis ground Circuit ground is connected to chassis ground References 1. IEEE standard 802.3. IEEE Standard Department, 2002. 2. Small Form Factor Pluggable (SFP) Transceiver Multi-Source Agreement (MSA), September 2000. 3. Fiber Channel Draft Physical Interface Specification (FC-PI-2 Rev.5). 4. Fiber Channel Physical and Signaling Interface (FC-PH/PH2/PH3).